This mag guide is a minimalist magwell designed with CCW in mind. The edge only protrudes 1/8" and allows use of OEM magazine baseplates. It is made from a billet aluminum with type 3 hard-anodized coating.
SAI currently offers this product for Gen3 G17, G22, G34, and G35 for $110. Gen4 ones are on the way as well as for Gen 3 G19/23s.